公开(公告)号：US20040151259A1

公开(公告)日：2004-08-05

申请号：US10693674

申请日：2003-10-24

Applicant: STMICROELECTRONICS N.V.

Inventor： Friedbert Berens ,  Ettore Messina ,  Miguel Kirsch

IPC: H04L027/06

CPC classification number: H03M13/3911 ,  H03M13/2957 ,  H03M13/612 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0066

Abstract: A method is provided for decoding a turbo-code encoded signal in a receiver. According to the method, the signal is received from a transmission channel, and the signal is digitally turbo-code decoded. Additionally, a quality information representative of conditions of the channel state estimation is dynamically determined, and the quality information is dynamically compared with a predetermined criteria for defining good or bad estimation conditions. A Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for good estimation conditions, or an approximation of the Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for bad estimation conditions. Also provided is a receiver that implements such a decoding method.

Abstract translation: 提供了一种用于对接收机中的turbo码编码信号进行解码的方法。 根据该方法，从传输信道接收信号，并且信号被数字turbo码解码。 此外，动态地确定代表信道状态估计的条件的质量信息，并且将质量信息与用于定义好的或不良的估计条件的预定标准动态地比较。 动态地选择对数域中的最大后验算法，以获得良好的估计条件，或者对于不良估计条件动态地选择对数域中的最大后验算法的近似值。 还提供了一种实现这种解码方法的接收机。

公开(公告)号：US20040058658A1

公开(公告)日：2004-03-25

申请号：US10621030

申请日：2003-07-16

Applicant: STMicroelectronics N.V.

Inventor： Miguel Kirsch ,  Friedbert Berens

IPC: H04B001/18

CPC classification number: H03J7/02 ,  H04J13/0044

Abstract: A method for controlling frequency of a local oscillator in a DS-CDMA type receiver includes transforming a known spread spectrum signal into a sampled digital signal formed of symbols with a despreaded frequency spectrum, and determining a residual frequency error fe for each symbol including a first residual frequency error fe1. The method further includes correcting the frequency of the local oscillator with the residual frequency errors, and determining an average of absolute values of a predetermined number of successive residual frequency errors. The average is compared with a threshold, and if the average is greater than or equal to the threshold, the local oscillator frequency is corrected using an error equal to nullsgn(fe1) (1/Tnullnullfe1null), where sgn is the sign function, null null is the absolute value function and T is duration of a symbol before determining the next residual frequency error associated with the next symbol.

Abstract translation: 一种用于控制DS-CDMA型接收机中的本地振荡器的频率的方法，包括将已知的扩频信号变换成由具有解扩频谱的符号形成的采样数字信号，以及确定每个符号的残差频率误差fe， 残余频率误差fe1。 该方法还包括用残余频率误差校正本地振荡器的频率，以及确定预定数量的连续残差频率误差的绝对值的平均值。 将平均值与阈值进行比较，如果平均值大于或等于阈值，则使用等于-sgn（fe1）（1 / T- | fe1 |）的误差校正本振振荡器频率，其中sgn为 符号函数，| | 是绝对值函数，T是在确定与下一符号相关联的下一个残余频率误差之前的符号的持续时间。

公开(公告)号：US20030050017A1

公开(公告)日：2003-03-13

申请号：US10232117

申请日：2002-08-30

Applicant: STMicroelectronics N.V.

Inventor： Miguel Kirsch

IPC: H04B017/00 ,  H04Q007/20

CPC classification number: G01S11/06

Abstract: Estimating the speed of movement of a mobile terminal of a wireless communication system communicating with a base station includes calculating a normalized auto-covariance of the instantaneous power of the signal received by the mobile terminal or by the base station.

Abstract translation: 估计与基站通信的无线通信系统的移动终端的移动速度包括计算由移动终端或基站接收的信号的瞬时功率的归一化自协方差。